Billionaire George Soros has long been accused of meddling in European politics, and now American lawmakers are demanding answers over reports United States tax dollars are going to help fund some of his liberal causes in the small, conservative country of Macedonia.

Seven congressmen want to know why the U.S. Ambassador to Macedonia Jess Baily, appointed by Barack Obama, chose Soros’ Open Society Foundation as the main implementer of U.S. Agency for International Development (USAID) projects in that country.